First time this coin has been auctioned?

As far as I can tell, a 1950 Franklin Proof in 67 ULTRA CAMEO has never been auctioned at Heritage or Greatcollections. Do any of you remember seeing one of these on Ebay over the years?
https://www.greatcollections.com/Coin/1766549/1950-Franklin-Half-Dollar-NGC-Proof-67-UC
Also, is there a way to check CAC's database to see if a coin like this has been sent to CAC? I'd be curios to know on this one.
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What’s with the large break in the proof surface below the Y in liberty, and what’s going on with the bell lines (debris or damage)? Looks closer to a 63 rather than a 67
There is no way to check the CAC database for anything, you can check the CAC pop report. The CAC pop report shows 4 for 1950 DCAM, 1 in 64, 3 in 65 nothing higher; there are several for 1950 CAM even up to PR68 CAM.
My Collection of Old Holders
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Good questions. Would love to view this coin in hand to see why it got a 67.
Gotcha. Thanks for letting me know. I had no idea there were only 4 coins to receive a CAC sticker for DCAM. Surprising a 68 Cameo received a sticker as well, would love to see that coin.